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据日本铃木试验结果,认为水稻抗稻瘟病的机制是体内K/NH_4的比值。钾和作物的健壮生长有密切关系。目前认为作物发病一般是由于病原菌的侵入和感染。如果作物生长健壮,不利于病原菌的寄生繁殖,则可以减少病害发生。作物抗病能力的强弱与品种特性有关,但同一品种在不同施肥条件下抗病能力也有差异。例如,关于稻瘟病的研究表明:水稻植株缺钾,稻瘟病容易发生;氮素过剩,即使施用钾肥也会发病。土壤缺钾,水稻茎叶中的钾/氮此失调,稻瘟病发病严重,情况和氮素过剩相同。关于钾增强水稻抗稻瘟病的机理,早已证实,钾可以促进蛋白质和纤维素的合成,降低体内可溶性含氮化合物的含量,增强水稻茎叶细胞壁厚度等。此外,铃木还发现,稻叶细胞液K/NH_4也影响稻瘟病孢子的发芽。稻瘟病的分生孢子附着于稻叶后,由于接触固体的刺激,孢子发芽管先端形成附着器,
According to the Japanese Suzuki test results, that the mechanism of rice blast resistance in vivo K / NH_4 ratio. Potassium and the robust growth of crops are closely related. The current crop is generally considered due to pathogens invade and infection. If the crop grow robust, is not conducive to the parasitic breeding of pathogens, you can reduce disease. The strength of crop disease resistance and variety characteristics, but the same varieties in different fertilization conditions are also different disease resistance. For example, studies on rice blast show that rice plants are deficient in potassium and susceptible to rice blast, and nitrogenous excess, even when potassium is used, can occur. Potassium deficiency in the soil, potassium / nitrogen in stems and leaves of rice disorders, rice blast disease, the same situation and nitrogen surplus. With regard to potassium-enhanced rice blast resistance mechanism, it has long been proven that potassium can promote the synthesis of protein and cellulose, reduce the content of soluble nitrogenous compounds in the body, and enhance the thickness of stem cell wall of rice. In addition, Suzuki also found that rice leaf cell liquid K / NH_4 also affected the germination of blast fungus spores. After the conidia of rice blast adhered to the rice leaves, due to the contact with the solid, the spore germination tube formed an attachment at the tip,